<template>
  <div class="list" ref="wrapper">
    <div>
      <div class="area">
        <div class="title border-topbottom">当前城市</div>
        <div class="button-list">
          <div class="button-wrapper">
            <div class="button">{{this.currentCity}}</div>
          </div>
        </div>
      </div>
      <div class="area">
          <div class="title border-topbottom">热门城市</div>
          <div class="button-list">
            <div class="button-wrapper" v-for="item of hot"
            :key="item.id"
            @click="handleCityClick(item.name)"
            >
              <div class="button">{{item.name}}</div>
            </div>
          </div>
      </div>
      <div class="area" v-for="(item, key) of cities"
           :key="key"
           :ref="key"
      >
          <div class="title border-topbottom">{{key}}</div>
          <div class="item-list">
            <div class="item border-bottom"
                 v-for="innerItem of item"
                 :key='innerItem.id'
                  @click="handleCityClick(innerItem.name)"
            >{{innerItem.name}}</div>
          </div>
      </div>
    </div>
  </div>
</template>

<script>
import BScroll from 'better-scroll'
import { mapState } from 'vuex'
export default {
  name: 'CityList',
  props: {
    hot: Array,
    cities: Object,
    letter: String
  },
  mounted () {
    this.scroll = new BScroll(this.$refs.wrapper)
  },
  watch: {
    letter () {
      if (this.letter) {
        const element = this.$refs[this.letter][0]
        this.scroll.scrollToElement(element)
      }
    }
  },
  methods: {
    handleCityClick (city) {
      this.$store.dispatch('changeCity', city)
    }
  },
  computed: {
    ...mapState({
      currentCity: 'city'
    })
  }
}
</script>

<style lang="stylus" scoped="scoped">
  @import '../../../assets/stylus/varibles.styl'
  .border-topbottom
    &:before
      border-color: #bbb
    &:after
      border-color: #bbb
  .list
    position: absolute
    top: 1.58rem
    overflow: hidden
    left: 0
    right: 0
    bottom: 0
    .title
      line-height: .44rem
      background-color: #eee
      padding-left: .2rem
      color: #666
      font-size: .26rem
      text-align: left
    .button-list
      padding: .1rem
      overflow: hidden
      .button-wrapper
        float: left
        width: 33.33%
        .button
          text-align: center
          padding: .1rem 0
          border-radius: .06rem
          margin: .1rem
          border: .02rem solid #ddd
    .item-list
      .item
        line-height: .76rem
        color: #666
        padding-left: .2rem
        text-align: left
    .border-bottom
      &:before
        border-color: #aaa
</style>
